package chapter_8;

import java.util.HashMap;
import java.util.Map;

public class Test5 {
    public static void main(String[] args) {
        Map<String,String> map = new HashMap<>();
        map.put("String","aa");
        String s = map.get("String");

        Map map1 = new HashMap<>();
        map1.put(Boolean.TRUE,"AA");
        Object o = map1.get("aa");

    }
}
